package com.webapp.api;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;


import com.webapp.helper.IPUtils;
import com.webapp.helper.StringUtil;


public class BaseController {

	/**
	 * 获取客户端ip
	 * @param request
	 * @return
	 */
	public String getClientIp(HttpServletRequest request){
		return IPUtils.getRemortIP(request);
	}
	
	
	/***
     * 获取 request 中 json 字符串的内容
     *
     * @param request
     * @return : <code>byte[]</code>
     * @throws IOException
     */
    public static String getRequestJsonString(HttpServletRequest request)
            throws IOException {
        String submitMehtod = request.getMethod();
        // GET
        if (submitMehtod.equals("GET")) {
        	String rs = request.getQueryString();
        	if(StringUtil.isNotBlank(rs)) {
        		return new String(request.getQueryString().getBytes("iso-8859-1"),"utf-8").replaceAll("%22", "\"");
        	}else {
        		return "";
        	}
            // POST
        } else {
            return getRequestPostStr(request);
        }
    }
     /* @param request
     * @return
     * @throws IOException
     */
    public static byte[] getRequestPostBytes(HttpServletRequest request)
            throws IOException {
        int contentLength = request.getContentLength();
        if(contentLength<0){
            return null;
        }
        byte buffer[] = new byte[contentLength];
        for (int i = 0; i < contentLength;) 
        {
            int readlen = request.getInputStream().read(buffer, i,
                    contentLength - i);
            if (readlen == -1) {
                break;
            }
            i += readlen;
        }
        return buffer;
    }
    /**
     * 描述:获取 post 请求内容
     * <pre>
     * 举例
     * </pre>
     * @param request
     * @return
 * @throws IOException
     */
    public static String getRequestPostStr(HttpServletRequest request)
            throws IOException {
        byte buffer[] = getRequestPostBytes(request);
        String charEncoding = request.getCharacterEncoding();
        if (charEncoding == null) {
            charEncoding = "UTF-8";
        }
        return new String(buffer, charEncoding);
    }
	
	
}
